Oops

An iceberg from the Portage Glacier is locked in the frozen Portage Lake south of Anchorage, Alaska. The glacier, which is a major Alaska tourist destination near Anchorage's southern edge, has retreated so far it no longer can be seen from a multimillion-dollar visitors center built in 1986. New research finds that melting glaciers and ice caps are contributing the most to sea level rise as temperatures warm. (Discovery)